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Diodes Incorporated APX810-40SRG-7
- Part No.:
- APX810-40SRG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX810-40SRG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23R
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
APX810-40SRG-7 from Diodes Incorporated is a 3-pin SOT23 microprocessor supervisory circuit with active-high push-pull RESET output, 4.00 V reset threshold (±0.08 V), 200 ms typical reset timeout, 30 µA supply current, and guaranteed operation down to VCC = 1 V. It monitors 5V/3.3V/3.0V digital system power rails to prevent erroneous microprocessor startup during brownout or power-up.
For engineers reviewing the APX810-40SRG-7 datasheet, APX810-40SRG-7 pinout, APX810-40SRG-7 application, or APX810-40SRG-7 equivalent, key selection criteria include reset threshold accuracy (±0.08 V at 4.00 V), push-pull active-high output drive capability, 240 ms minimum reset assertion time after VCC recovery, and SOT23 footprint compatibility for space-constrained embedded designs.
Technical Context
The APX810-40SRG-7 integrates a precision voltage comparator with internal reference and a monostable delay circuit to generate a clean, glitch-immune reset pulse. Its reset comparator ignores fast transients on VCC and maintains valid logic state across -40°C to +85°C ambient temperature.
It operates over VCC = 1.1 V to 5.5 V, asserts RESET high when VCC exceeds 4.00 V (with ±0.08 V tolerance), holds RESET active for ≥240 ms after VCC recovery, and guarantees RESET validity down to VCC = 1 V - enabling reliable boot sequencing in battery-powered and industrial control systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.00 V ±0.08 V - ensures reset deassertion only after stable 5V/3.3V rail reaches safe operating margin |
| Reset Timeout | 200 ms typ., 140–280 ms over temp - provides sufficient hold time for µP initialization before release |
| Supply Current | 30 µA typ. at +25°C - enables multi-year battery life in portable instrumentation |
| VCC Operating Range | 1.1 V to 5.5 V - supports wide-input LDO-fed systems and brownout detection down to 1V |
| Output Type | Push-pull active-high - eliminates external pull-up resistor, drives CMOS inputs directly |
| Reset Validity | Guaranteed to VCC = 1 V - ensures deterministic reset state during deep undervoltage conditions |
| ESD Protection | 5 kV HBM - protects against handling-induced transients in assembly and field environments |
Pinout & Package
SOT23-3 (SR package) with 2.90 mm × 1.30 mm × 1.00 mm body, 0.95 mm pitch, and exposed thermal pad-compatible layout per Diodes Inc. outline drawing SOT23.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Power Supply Input | Accepts 1.1–5.5 V supply; powers internal comparator and driver; must be decoupled locally |
| 2 (GND) | Ground Reference | System ground return path; forms reference for reset threshold and output logic levels |
| 3 (RESET) | Active-High Reset Output | Push-pull CMOS output; drives high (≥0.8×VCC) when VCC > 4.00 V and timeout complete; sinks <0.4 V when low |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.00 V threshold | ±0.08 V tolerance ensures consistent reset release point across voltage and temperature for 5V systems |
| Push-pull active-high output | Eliminates need for external pull-up resistor and associated board area, leakage, and noise susceptibility |
| 240 ms minimum reset assertion | Meets JEDEC JESD8-12E requirement for µP power-on reset duration without external timing components |
| Valid reset down to VCC = 1 V | Enables predictable behavior during deep brownout or battery depletion-no floating output state |
| Green SOT23 package | Halogen- and antimony-free, lead-free, RoHS-compliant molding compound meeting IEC 61249-2-21 |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
Use Scenario: Power monitoring in DIN-rail mounted programmable logic controllers with dual 5V/24V supplies. IC Role / Device Role / Timing Role: Supervises 5V logic rail and asserts active-high RESET to ARM Cortex-M7 MCU until stable. Use Value: Prevents firmware corruption during factory line voltage sags by holding reset ≥240 ms after VCC recovery. | Use Scenario: Battery-backed portable ultrasound device requiring cold-start reliability after storage discharge. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output feeding SoC and triggers active-high RESET on brownout. Use Value: Ensures deterministic boot sequence even when battery drops to 3.2V, leveraging 4.00 V threshold margin. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: 12V-to-5V converted supply supervision in non-safety-critical BCM subsystems. IC Role / Device Role / Timing Role: Provides reset signal to 8-bit microcontroller during ignition cycling and load-dump transients. Use Value: Immunity to fast VCC transients prevents spurious resets during alternator switching events. | Use Scenario: Tamper-resistant meter with backup supercapacitor maintaining RTC and memory during AC loss. IC Role / Device Role / Timing Role: Detects main 5V rail collapse and asserts RESET to isolate measurement core before backup switchover. Use Value: 30 µA quiescent current extends supercapacitor hold-up time by >15% versus higher-IQ alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2T | 4.00 V threshold, open-drain active-low output, 14 µA IQ, SOT23-3 | Requires external pull-up; incompatible logic polarity; lower supply current but no push-pull drive | Select only if existing design uses active-low reset and board layout allows pull-up addition |
| TPS3808G33DBVR | 3.3 V threshold, push-pull active-high, 12 µA IQ, SOT23-6 | Different threshold; larger 6-pin package; includes manual reset input and watchdog timer | Choose when 3.3V rail monitoring is required and extra features justify footprint and cost increase |
Compared with MAX809TRD2T and TPS3808G33DBVR, the APX810-40SRG-7 uniquely combines 4.00 V precision threshold, active-high push-pull output, and minimal 3-pin SOT23 footprint - making it optimal for cost-sensitive, space-constrained 5V system resets where polarity and simplicity are critical.
Availability
APX810-40SRG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical diagnostics, automotive body control modules, and smart energy meters requiring stable component supply and long-term production continuity.
Supply support for APX810-40SRG-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The APX809/810 series was designed specifically for cost-effective, single-function power-supply supervision in resource-constrained embedded systems - prioritizing precision threshold accuracy, ultra-low quiescent current, and minimal external component count.
FAQ
What is the exact reset threshold voltage and tolerance for APX810-40SRG-7?
The APX810-40SRG-7 has a nominal reset threshold of 4.00 V, with a guaranteed range of 3.92 V to 4.08 V over -40°C to +85°C ambient temperature. This specification is confirmed in the Electrical Characteristics table of DS31322 Rev. 5–3, ensuring reliable release timing for 5V systems operating near their lower rail limit.
Does APX810-40SRG-7 require an external capacitor for reset timing?
No. The APX810-40SRG-7 integrates an internal timing circuit and requires no external capacitor. Its reset timeout is fixed at 200 ms typical (140–280 ms over temperature), eliminating component count, board space, and tolerance-related variability found in RC-based supervisors.
Can APX810-40SRG-7 operate with a 3.3V supply?
Yes. The device operates over VCC = 1.1 V to 5.5 V. When powered from 3.3V, its 4.00 V reset threshold remains fixed - meaning RESET will not assert unless VCC rises above 4.00 V. Thus, it is intended for 5V systems or higher-voltage rails; for 3.3V supervision, APX810-31SRG-7 (3.08 V threshold) is the correct variant.
Is APX810-40SRG-7 pin-compatible with APX809-40SRG-7?
Yes - both share identical SOT23-3 (SR) pinout: Pin 1 = VCC, Pin 2 = GND, Pin 3 = RESET. However, APX809-40SRG-7 provides active-low RESET, while APX810-40SRG-7 provides active-high RESET. Logic polarity must be verified in the host system before substitution.
APX810-40SRG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT23R
APX810-40SRG-7 FAQ
1.How can I place an order for APX810-40SRG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX810-40SRG-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for APX810-40SRG-7 reliable?
The price and inventory of APX810-40SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX810-40SRG-7 is usually 5 days.
3.What payment methods are accepted for APX810-40SRG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX810-40SRG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX810-40SRG-7?
APX810-40SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX810-40SRG-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for APX810-40SRG-7?
For technical support, including APX810-40SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX810-40SRG-7 requirements.
6.How does Aetrix verify that APX810-40SRG-7 is sourced from the original manufacturer or authorized distributors?
All APX810-40SRG-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that APX810-40SRG-7 meets industry standards.
7.What is the process for return or replacement of APX810-40SRG-7?
All APX810-40SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX810-40SRG-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The APX810-40SRG-7 part is unused and in its original packaging.
Return procedure for APX810-40SRG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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